Wrench



WRENCH Filed Feb. '7. 1921 Patented pr. 29, 192.

WRENCH.

Application filed February 7, 1921.

To all whom it muy concern.'

Be it known that l, .loi-m ZrLLroX, a citzen of the United vStates, residing at Orchard Park, in the county et Erie and State of NewYork, have invented new and useful Improvements in l/Vrenches. of which the 'Eollowing is a specification.

rThis invention relates to a wrench and has for its principal object the production of a strong, durable and efficient wrench which can be produced at low cost from stock bar metal without the use of dies for forming the jaws and shank of the wrench but instead can be cut in gangs by the use of an ordinary milling machine and assembled by a simple bending operation.

In the accompanying drawings: Figure 1 is a side elevation of my improved wrench. Figure 2 is a longitudinal section of the same. Figures 3, 4 and 5 are cross sections on the correspondingly numbered lines in Fig. 2. Figures 6 and 7 are perspective views oi the iixed andmovable jaws and associated parts showing the condition of thesame before assembling. Fig. 8 is a horizontal section on line 8-8, Fig. 2. n

Similar characters of reference indicate corresponding parts throughout the several views.

10 represents the longitudinal bar or shank of the wrench which is preferably constructed of a bar of metal which is rectangular in cross section and can be cut in suitable lengths from a stock bar without any waste excepting finishing the rear end of the same by rounding the corners, or otherwise.

11 represents the front or fixed jaw of the wrench which has its inner longitudinal edge 12 engaging with the inner longitudinal edge of the shank and provided with two cheeks 13, 13, which extend transversely from this jaw along opposite sides of the 1shank and are provided at their outer longitudinal edges with lips 14 which are bent toward each other against the outer longitudinal edge of the shank. The integral blank for this jaw and its cheeksl and lips is first cut from a stock metal bar which can be done with practically no waste of metal after which a longitudinal groove is cut in the back of the blank by milling to form. the wings which subsequently constitute the cheeks and lips, as shown in Fig. 6. This operation especially when cutting a gang of blanks at one time, can be done at JOHN ZILLIOX, OF ORCHRD PARK, NEW YORK.

Serial No. 442,900.

a very low cost. Thereafter the wings of a 'front aw are placed astride of the .front end of the shank and then the extremities of the wings are bent towardY each other and against the outer longitudinal edge of the shank with a cold sheet, whereby the front jaw and shank are securely connected and capable of being used without further attention. lt is preferable however to additionally secure the shank and front jaw together by fastening a pin 15 transversely in corresponding openings in the cheeks of the front jaw and the adjacent intervening part of the shank, as shown in Figs. 1, 2 and 3.

16 represents the movable rear aw of the wrench which co-operates with the trent jawy for grasping articles. This jaw is formed integrally with a carriage which slides lengthwise on the shank and is provided with a cross piece 17 upon the frontend of which the movable rear jaw is arranged. This cross piece is arranged lengthwise of the inner longitudinal edge of the shank and is providedy with two cheeks 18, 18 which project laterally from the cross piece along opposite sides of the shank and has its eX- tremities bent toward each other in the 'form of lips 19 along the outer longitudinal edge of the shank. The cross piece, cheeks andlips of the carriage do not lit tightly against the shank in order -to permit the same to slide freely lengthwise thereon. The blank for the rear movable jaw and its carriage is also cut from a stock metal bar, after which a groove is milled into the back of the same to form the two wings from which the two cheeks and lips ot the respective carriage are subsequently constructed. When milling a gang of such carriages the cost of the same is reduced to a minimum.

By constructing the shank and front and rear jaws and the means of mounting the same on the shank in the manner described, the parts can be made of high grade material at very low cost and equal, if not exceed in efficiency, wrenches in the manufacture of which expensive dies have usually been employed for forging the metal into the desired shape. These dies are particularly expensive when making the larger sizes of wrenches having comparatively long Shanks or handles whereas the length of the shank or the size of the jaws in the present invention is of no particular consequence. Any suitable means may be employed for adjusting the movable jawptoward and from the ixedjaw, those shown in the 'drawings' being suitable and preferred and comprising a gear rack 2O `formed on the inner longitudinal*edge` of the shank, avworrn 2l` engaging its thread with said rack and arranged in a recess 22 formed in the carriage in rear of the movable jaw,y and a pivot pin,V

23upon which said worin is journaled which is supported with its unthreaded front end yin an unthreaded kopening 24 in the front Y partothe cross piece of the carriage whileV v. its externally-threaded rear end 25 engages with an internally threaded opening 26 in the rear part of thecross piece of the carriage, `as 'shown in Figs. l, 2 and 5. Upon turning the worin by engaging the fingers with opposite Ysides ofi the knurled thread thereof,y Vthe samer will cause the movable yjaw to either advance or recede and thus permit of adaptingnthe jaws tothewobject to be grasped.

If desired, the connection between the fixed jaw 1l and the shank Al0 maybe eiiected by bending the opposing edges of the lips y14; downwardly in the torn/1 of hooks l 2 7 into a recess 28. formed'in the front part of the upper edgefo the shanln'as shown in Figs. 27 3 and 8. Turning or twistingfof this ljaw on theA shank may also be resistedv when Vsubjected torheavy strains by means `of transverse ribs or project-ions 29 arranged on the inner sides ofthe cheeks 13 and en gaging with recesses or transverse grooves 3() Varranged on the opposite sides of the n front part V,of the shank, these ribs being :formed'and engagedwith these grooves by,"

c pressing the cheeks 13 against opposite sides 1 of the Shanks The hooks27 andi recess 28 andthe ribs 29 and grooves 30 may be ernployed either in addition to the fastening pin vl5 orthe same lmay be employed to' the sides of and provided withY two outwardly project-YV ing cheeks whichare arranged on opposite and jaw Y Y Sadbar andl havelips at their 'e outer ends which project toward 'each other and overhang the outer edge of the bar, the :c

outer edge of the'bar beingV provided with a recess, and said lips being constructed 1n the form or" hooks which"engageY said re-y cess. e Y Y c Y'2. wrench comprising a bar, vand a jaw arranged alongv the inner edge of the bar and provided with two outwardly projectsidesofsaid bar and have lips at their outer ends which project toward each other and overhang the outer edge of the barY and the ing cheeks which are arranged'on'opposite l A opposing sides oit said bar, said bar and.

cheeks beingl provided with interlocking shoulders which prevent longitudinal moveinent et these parts on each other.Y

3'. A wrench comprising a bar, and aw arranged' alongthe inner-edgev of the bar and provided with two outwardly projecting cheeksv which are arranged on opposite sides of 'said bar'r and-have lips at their outer ends whichprojecttoward each other and overhangythe outer edge of Vthe bar, the l outeredge of the ybar' being provided with a recess, and said lips beingconstructed in the y forno ot hooks which engage said recess and Y *beingl provided with interlocking shoulders'v the opposing sides4 of said bar andcheeks which lprevent 'longitudinal movement` of these parts on each other.

Jenn zrLLioX. 

